EP0447942B1 - EMI impermeable multiple plug for interconnection of metallic board elements - Google Patents
EMI impermeable multiple plug for interconnection of metallic board elements Download PDFInfo
- Publication number
- EP0447942B1 EP0447942B1 EP91103859A EP91103859A EP0447942B1 EP 0447942 B1 EP0447942 B1 EP 0447942B1 EP 91103859 A EP91103859 A EP 91103859A EP 91103859 A EP91103859 A EP 91103859A EP 0447942 B1 EP0447942 B1 EP 0447942B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- contact strip
- edge
- wall element
- tongues
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 210000002105 tongue Anatomy 0.000 claims description 22
- 230000005855 radiation Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 2
- 238000005452 bending Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0015—Gaskets or seals
- H05K9/0016—Gaskets or seals having a spring contact
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
Definitions
- the invention relates to a contact strip of the type mentioned in the preamble of claim 1.
- DD-C-200 252 fasten a contact strip according to the preamble of claim 1 with projecting contact projections, which abut against a contact surface formed on the adjacent wall element, in each case on an essentially right-angled edge web of a wall element.
- the contact strip has consecutive contact bulges produced by embossing over its entire length. This makes the contact strip extremely stiff on the one hand, so that it e.g. can no longer adapt to the inevitable deformations of the associated wall element as a result of manufacturing inaccuracies, which can make the plugging in of the contact strip very difficult under certain circumstances.
- the number of contact points with the adjacent wall element is very high, so that e.g.
- the invention first makes use of the knowledge that shielding that is immune to interference does not require gapless contact or a very dense arrangement of the contact areas. Rather, larger gaps, the size of which depends on the type of electromagnetic interference to be shielded, are harmless between the contact areas.
- the inventive design and arrangement of the contact tongues results in a very flexible contact strip which easily adapts to deformations of the wall element without the interference radiation shielding being noticeably deteriorated.
- the design and arrangement of the clamp elements according to the invention does not result in excessive stiffness in this area either.
- the frictional forces caused by the contact tongues on the one hand and the clamp elements on the other hand are less dependent on manufacturing inaccuracies or on the surface condition of the wall elements compared to the known solution.
- the contact tongues can be produced in a simple manner by a single stamping and bending process.
- the clip elements are preferably formed in one piece with the contact strip; they can also be made by a single stamping and bending process with a suitable tool in one step with the manufacture of the contact tongues.
- the suitable distances between the contact tongues can be determined in a known manner from the properties of the given interference radiation to be shielded.
- the clamp elements are each provided with locking recesses for locking with locking projections formed on the edge web.
- the latching recesses engage automatically when the contact strip is plugged onto the edge web and on the one hand ensure precise alignment of the contact strip on the edge web and on the other hand ensure that the contact strip is firmly held.
- the contact tongues preferably have approximately the shape of an obtuse-angled hook with a first leg bent out of the contact strip level and a subsequent leg bent back in the direction of the contact strip level.
- the bending edge between the first leg and the second leg forms a linear contact zone lying against the contact surface of the adjacent wall element.
- the longitudinal edge of the contact strip facing away from the clamp elements is bent towards the side of the clamp elements. This design ensures that this longitudinal edge does not get caught with the associated adjacent wall element when a circuit board is inserted and thus when a wall element is positioned between existing wall elements.
- the contact tongues are each provided with a recess which reduces the material cross section in the region of the bending edge.
- the remaining material cross section and thus the spring force of the contact tongues can be determined by a suitable choice of the dimensions of this recess.
- Fig. 1 shows a perspective view, Fig. 2 in a cross section a wall element 2, which is intended to be attached to an edge of a circuit board 4, as can be seen in particular Fig. 2.
- a mounting bracket 8 is provided with a threaded bore 10 formed thereon, so that the circuit board 4 can be screwed to the mounting bracket 8.
- a hole 12 formed at the upper end of the wall element 2 serves in a manner not shown for fastening the wall element to a device chassis.
- an edge web 14 is formed which is bent substantially at right angles to the wall element plane and onto which a contact strip 16 can be clamped.
- the contact strip 16 lies on the outside 18 of the edge web 14 facing the adjacent wall element 6. It is provided with clamp elements 20 which overlap the free edge 22 of the edge web and hold the contact strip 16 on the edge web 14.
- the clamp elements 20 are formed in one piece with the contact strip 16 and are produced, for example, by a stamping and bending process.
- the contact strip has a series of contact tongues 24 punched out of the contact strip wall and bent out of the contact strip plane. As shown in FIG. 2 in particular, these contact tongues 24 each contact contact surfaces 26 of an adjacent wall element. As particularly shown in FIG. 3, the Contact tongues 24 in longitudinal section approximately the shape of an obtuse-angled hook with a first leg 28 bent out of the contact strip level and a subsequent leg 30 bent back to the contact strip level. The bending edge 32 between the first leg 28 and the second leg 30 forms a linear contact zone.
- the contact tongues 24 are each provided with a recess 34, which reduces the material cross section in the region of the bending edge 36 of the first leg 28 and thus the spring force of the contact tongue.
- the longitudinal edge 38 of the contact strip facing away from the clamp elements 20 is to the side of the clamp elements 20, i.e. thus beveled towards the outside 18 of the edge web 14, so that the contact strip cannot get caught on the contact surface 26 of the adjacent wall element 6 when the wall element 2 is being fitted.
- the bracket elements 20 are each provided with locking recesses 40; these are intended to be locked when the contact strip is clamped onto the edge web 14 on this locking projections 42, as can be seen in particular in FIG. 3.
- FIG. 4 shows a view of a contact strip in the direction of arrow 44 in FIG. 1, that is to say on the front side of the contact strip 16. It can be seen that a large number of contact tongues arranged at regular intervals are provided. The distance between the contact blades is determined from the properties of the interference radiation to be shielded. For example, it is between 2 and 4 cm.
- FIG. 5 shows a contact strip according to FIG. 4 in a view corresponding to the arrow 46 in FIG. 1 and reveals that a large number of clamp elements 20 are arranged on the contact strip 16 at regular intervals from one another.
- the clamp elements 20 are each arranged in the area of contact tongues 24 and thus at the same mutual spacing, so that the contact tongues and the clamp elements are each simultaneously operated by a suitably designed stamping and bending tool can be produced.
- the contact strip 16 is made of a resilient, metallic material.
- the contact strips according to the invention are also suitable for producing a shielding contact of the device wall 50 with the wall element 2 lying against it.
- the clamp elements 54 pass through suitable openings 56 and overlap a boundary edge of the openings 56, the actual contact strip opening the side of the device wall 50 facing the wall element 2 rests and the contact tongues 58 of the contact strip bear against the contact surface 26 of the wall element 2.
- a shielding contact between a wall element, for example the wall element 6, and a device wall arranged on the left in FIG. 2 can be produced via a contact strip according to the invention, as is readily understandable and therefore not shown in detail.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
Description
Die Erfindung betrifft eine Kontaktleiste der im Oberbegriff des Anspruches 1 genannten Art.The invention relates to a contact strip of the type mentioned in the preamble of claim 1.
Es ist eine gängige Technik, Schaltungsplatinen an einer Kante mit einem quer zur Platinenebene stehenden Wandelement zu versehen, wobei sich die Wandelemente mehrerer nebeneinander in ein Gehäuse eingeschobener Schaltungsplatinen zu einer mehr oder weniger geschlossenen Abschlußwand ergänzen. Die Wandelemente sind entweder geschlossene Flächen oder sie sind mit Steckerelementen versehen, über die die jeweiligen Schaltungsplatinen mit äußeren Geräten elektrisch verbunden werden können. Damit die aus den Wandelementen gebildete Wand gegen elektromagnetische Störstrahlung dicht ist, müssen die einzelnen Wandelemente elektrisch leitend miteinander verbunden werden.It is a common technique to provide circuit boards at one edge with a wall element which is transverse to the plane of the board, the wall elements of a plurality of circuit boards inserted next to one another complementing one another to form a more or less closed end wall. The wall elements are either closed surfaces or they are provided with plug elements via which the respective circuit boards can be electrically connected to external devices. So that the wall formed from the wall elements is sealed against electromagnetic interference radiation, the individual wall elements must be connected to one another in an electrically conductive manner.
Es ist bereits bekannt, an den Längskanten der Wandelemente jeweils über diese Längskanten überstehende federnde Kontaktbleche anzuordnen, die mit Kontaktblechen benachbarter Wandelemente in Berührung kommen. Bei dieser Konstruktion ist an jeder einem benachbarten Wandelement zugewandten Seitenkante eines Wandelementes ein Kontaktblech befestigt, was diese Lösung aufwendig und teuer macht.It is already known to arrange on the longitudinal edges of the wall elements each projecting over these longitudinal edges resilient contact plates which come into contact with contact plates of adjacent wall elements. In this construction, a contact plate is attached to each side edge of a wall element facing an adjacent wall element, which makes this solution complex and expensive.
Es ist auch bereits durch die DD-C- 200 252 bekannt, jeweils an einem im wesentlichen rechtwinklig abgekanteten Randsteg eines Wandelementes eine Kontaktleiste gemäß dem Oberbegriff des Anspruches 1 mit vorstehenden Kontaktvorsprüngen zu befestigen, die sich gegen eine am benachbarten Wandelement ausgebildete Kontaktfläche anlegen. Die Kontaktleiste weist über ihre ganze Länge lückenlos aufeinanderfolgende, durch Prägungen hergestellte Kontaktausbeulungen auf. Dadurch wird die Kontaktleiste einerseits äußerst steif, so daß sie sich z.B. unvermeidlichen Verformungen des zugeordneten Wandelementes infolge Fertigungsungenauigkeiten nicht mehr anpassen kann, wodurch das Aufstecken der Kontaktleiste unter Umständen sehr erschwert wird. Außerdem ist die Zahl der Kontaktstellen zum benachbarten Wandelement sehr hoch, so daß z.B. ein Einschieben der Kontaktleiste zwischen zwei benachbarte Wandelemente häufig nur mit Schwierigkeiten möglich ist. Ein weiterer Nachteil wird darin gesehen, daß die Kontaktleiste über ihre gesamte Länge klammerartig umgebogen ist. Auch dieses Merkmal führt dazu, daß die Kontaktleiste sehr steif wird, so daß sich die beschriebenen Schwierigkeiten noch verstärken. Auch die Klammereinrichtung selbst erfordert wegen der großen Klammerfläche schon bei geringen Überdicken des Wandelementes bzw. z.B. bei Rostansatz große Kräfte beim Aufstecken auf das Wandelement.It is also known from DD-C-200 252 to fasten a contact strip according to the preamble of claim 1 with projecting contact projections, which abut against a contact surface formed on the adjacent wall element, in each case on an essentially right-angled edge web of a wall element. The contact strip has consecutive contact bulges produced by embossing over its entire length. This makes the contact strip extremely stiff on the one hand, so that it e.g. can no longer adapt to the inevitable deformations of the associated wall element as a result of manufacturing inaccuracies, which can make the plugging in of the contact strip very difficult under certain circumstances. In addition, the number of contact points with the adjacent wall element is very high, so that e.g. it is often difficult to insert the contact strip between two adjacent wall elements. Another disadvantage is seen in the fact that the contact strip is bent like a clamp over its entire length. This feature also leads to the contact strip becoming very stiff, so that the difficulties described are exacerbated. The clamp device itself, due to the large clamp area, requires even small over-thicknesses of the wall element or e.g. with rust, great forces when plugging onto the wall element.
Es ist die Aufgabe der vorliegenden Erfindung, ein Kontaktleiste der im Oberbegriff des Anspruches 1 genannten Art zu schaffen, welches herstellungstechnisch und montagetechnisch sehr einfach und damit preiswert ist und welches auch bei fertigungsbedingten oder z.B. durch Rostansatz oder dergleichen verursachten Ungenauigkeiten der Wandelemente keine übermäßigen Kräfte bei der Montage erfordert.It is the object of the present invention to provide a contact strip of the type mentioned in the preamble of claim 1, which is very simple in terms of production technology and assembly technology and thus inexpensive and which is also suitable for production-related or for example inaccuracies of the wall elements caused by rust or the like do not require excessive forces during assembly.
Diese Aufgabe ist erfindungsgemäß durch die im Anspruch 1 enthaltenen Merkmale gelöst.This object is achieved according to the invention by the features contained in claim 1.
Die Erfindung macht sich zunächst die Erkenntnis zunutze, daß eine störstrahlsichere Abschirmung keinen lückenlosen Kontakt bzw. eine sehr dichte Anordnung der Kontaktbereiche erfordert. Vielmehr sind größere Lükken, deren Größe sich nach der Art der abzuschirmenden Elektrostörstrahlung richtet, zwischen den Kontaktbereichen unschädlich.The invention first makes use of the knowledge that shielding that is immune to interference does not require gapless contact or a very dense arrangement of the contact areas. Rather, larger gaps, the size of which depends on the type of electromagnetic interference to be shielded, are harmless between the contact areas.
Durch die erfindungsgemäße Ausgestaltung und Anordnung der Kontaktzungen ergibt sich im Gegensatz zu der bekannten geprägten Ausführung eine sehr flexible Kontaktleiste, die sich leicht an Verformungen des Wandelementes anpaßt, ohne daß die Störstrahlabschirmung merklich verschlechtert wird. Durch die erfindungsgemäße Ausgestaltung und Anordnung der Klammerelemente ergibt sich auch in diesem Bereich keine zu große Steifigkeit. Außerdem sind auch die durch die Kontaktzungen einerseits und die Klammerelemente andererseits verursachten Reibungskräfte gegenüber der bekannten Lösung weniger von Fertigungsungenauigkeiten bzw. vom Oberflächenzustand der Wandelemente abhängig.In contrast to the known embossed design, the inventive design and arrangement of the contact tongues results in a very flexible contact strip which easily adapts to deformations of the wall element without the interference radiation shielding being noticeably deteriorated. The design and arrangement of the clamp elements according to the invention does not result in excessive stiffness in this area either. In addition, the frictional forces caused by the contact tongues on the one hand and the clamp elements on the other hand are less dependent on manufacturing inaccuracies or on the surface condition of the wall elements compared to the known solution.
Die Kontaktzungen können in einfacher Weise durch einen einzigen Stanz-Biegevorgang hergestellt werden.The contact tongues can be produced in a simple manner by a single stamping and bending process.
Die Klammerelemente sind vorzugsweise mit der Kontaktleiste einstückig ausgebildet; sie können ebenfalls durch einen einzigen Stanz-Biegevorgang hergestellt werden, und zwar bei geeignetem Werkzeug in einem Arbeitsgang mit der Herstellung der Kontaktzungen.The clip elements are preferably formed in one piece with the contact strip; they can also be made by a single stamping and bending process with a suitable tool in one step with the manufacture of the contact tongues.
Die geeigneten Abstände der Kontaktzungen lassen sich in bekannter Weise aus den Eigenschaften der gegebenen, abzuschirmenden Störstrahlung ermitteln.The suitable distances between the contact tongues can be determined in a known manner from the properties of the given interference radiation to be shielded.
Um einen guten Halt der Kontaktleiste auf dem Randsteg sicherzustellen, ist weiterhin erfindungsgemäß vorgesehen, daß die Klammerelemente jeweils mit Rastausnehmungen zum Verrasten mit am Randsteg ausgebildeten Rastvorsprüngen versehen sind. Die Rastausnehmungen rasten beim Aufstecken der Kontaktleiste auf den Randsteg selbsttätig ein und stellen einerseits eine genaue Ausrichtung der Kontaktleiste auf dem Randsteg und andererseits einen festen Halt der Kontaktleiste sicher.In order to ensure a good hold of the contact strip on the edge web, it is further provided according to the invention that the clamp elements are each provided with locking recesses for locking with locking projections formed on the edge web. The latching recesses engage automatically when the contact strip is plugged onto the edge web and on the one hand ensure precise alignment of the contact strip on the edge web and on the other hand ensure that the contact strip is firmly held.
Die Kontaktzungen haben vorzugsweise im Längsschnitt etwa die Form eines stumpfwinkligen Hakens mit einem ersten, aus der Kontaktleistenebene herausgebogenen Schenkel und einem anschließenden, in Richtung zur Kontaktleistenebene zurückgebogenen Schenkel. Die Biegekante zwischen dem ersten Schenkel und dem zweiten Schenkel bildet eine linienförmige, an der Kontaktfläche des benachbarten Wandelementes anliegende Kontaktzone.In longitudinal section, the contact tongues preferably have approximately the shape of an obtuse-angled hook with a first leg bent out of the contact strip level and a subsequent leg bent back in the direction of the contact strip level. The bending edge between the first leg and the second leg forms a linear contact zone lying against the contact surface of the adjacent wall element.
Außerdem ist erfindungsgemäß vorgesehen, daß der den Klammerelementen abgewandte Längsrand der Kontaktleiste zur Seite der Klammerelemente hin abgekantet ist. Diese Ausbildung stellt sicher, daß sich dieser Längsrand beim Einschieben einer Schaltungsplatine und damit bei einem Positionieren eines Wandelementes zwischen bereits vorhandene Wandelemente nicht mit dem zugeordneten, benachbarten Wandelement verhakt.In addition, it is provided according to the invention that the longitudinal edge of the contact strip facing away from the clamp elements is bent towards the side of the clamp elements. This design ensures that this longitudinal edge does not get caught with the associated adjacent wall element when a circuit board is inserted and thus when a wall element is positioned between existing wall elements.
Die Kontaktzungen sind gemäß einer weiteren Ausgestaltung der Erfindung jeweils mit einer den Materialquerschnitt im Ausbiegekantenbereich verringernden Aussparung versehen. Durch eine geeignete Wahl der Abmessungen dieser Aussparung kann der verbleibende Materialquerschnitt und damit die Federkraft der Kontaktzungen bestimmt werden.According to a further embodiment of the invention, the contact tongues are each provided with a recess which reduces the material cross section in the region of the bending edge. The remaining material cross section and thus the spring force of the contact tongues can be determined by a suitable choice of the dimensions of this recess.
Weitere Merkmale sowie Vorteile der Erfindung ergeben sich aus den Ansprüchen sowie aus der Beispielsbeschreibung. Ein Ausführungsbeispiel ist in der Zeichnung dargestellt und im folgenden näher beschrieben. Es zeigen:
- Fig. 1
- in perspektivischer Darstellung einen Teil eines Wandelementes mit aufgeklemmter Kontaktleiste;
- Fig. 2
- einen Querschnitt durch ein zwischen einem benachbarten Wandelement und einer Gerätewand angeordneten Wandelement, mit montierten Kontaktleisten;
- Fig. 3
- in vergrößerter Darstellung einen Querschnitt durch eine Kontaktleiste;
- Fig. 4
- eine Ansicht einer Kontaktleiste von der Vorderseite her;
- Fig. 5
- eine Ansicht einer Kontaktleiste gemäß Fig. 4 von der Rückseite her.
- Fig. 1
- a perspective view of part of a wall element with a clamped contact strip;
- Fig. 2
- a cross section through a wall element arranged between an adjacent wall element and a device wall, with mounted contact strips;
- Fig. 3
- in an enlarged view a cross section through a contact strip;
- Fig. 4
- a view of a contact strip from the front;
- Fig. 5
- a view of a contact strip according to FIG. 4 from the back.
Fig. 1 zeigt in perspektivischer Darstellung, Fig. 2 in einem Querschnitt ein Wandelement 2, welches dazu bestimmt ist, an einer Kante einer Schaltungsplatine 4 befestigt zu werden, wie insbesondere Fig. 2 erkennen läßt. Mehrere nebeneinander angeordnete Wandelemente 2, 6, die mit einem Gerätechassis verschraubt werden können, bilden eine mehr oder weniger geschlossene Gerätewand, die den Aufnahmeraum für die eingeschobenen Schaltungsplatinen 4 nach außen abschließt. Zur Befestigung der Schaltungsplatine 4 am Wandelement 2 ist eine Befestigungslasche 8 mit einer daran ausgebildeten Gewindebohrung 10 vorgesehen, so daß die Schaltungsplatine 4 mit der Befestigungslasche 8 verschraubt werden kann. Eine am oberen Ende des Wandelementes 2 ausgebildete Bohrung 12 dient in nicht näher dargestellter Weise zum Befestigen des Wandelementes an einem Gerätechassis.Fig. 1 shows a perspective view, Fig. 2 in a cross section a
Am Wandelement 2 ist ein im wesentlichen rechtwinklig zur Wandelementebene abgekanteter Randsteg 14 ausgebildet, auf die eine Kontaktleiste 16 aufgeklemmt werden kann. Die Kontaktleiste 16 liegt auf der dem benachbarten Wandelement 6 zugewandten Außenseite 18 des Randsteges 14 auf. Sie ist mit Klammerelementen 20 versehen, die die freie Kante 22 des Randsteges übergreifen und die Kontaktleiste 16 auf dem Randsteg 14 festhalten. Die Klammerelemente 20 sind mit der Kontaktleiste 16 einstückig ausgebildet und beispielsweise durch einen Stanz-Biegevorgang hergestellt.On the
Die Kontaktleiste weist eine Reihe von aus der Kontaktleistenwand freigestanzten und aus der Kontaktleistenebene ausgebogenen Kontaktzungen 24 auf. Wie insbesondere Fig. 2 zeigt, legen sich diese Kontaktzungen 24 jeweils an Kontaktflächen 26 eines benachbarten Wandelementes an. Wie insbesondere Fig. 3 zeigt, haben die Kontaktzungen 24 im Längsschnitt etwa die Form eines stumpfwinkligen Hakens mit einem ersten, aus der Kontaktleistenebene herausgebogenen Schenkel 28 und einem daran anschließenden, zur Kontaktleistenebene zurückgebogenen Schenkel 30. Die Biegekante 32 zwischen dem ersten Schenkel 28 und dem zweiten Schenkel 30 bildet eine linienförmige Kontaktzone.The contact strip has a series of
Die Kontaktzungen 24 sind jeweils mit einer Aussparung 34 versehen, die den Materialquerschnitt im Bereich der Ausbiegekante 36 des ersten Schenkels 28 und damit die Federkraft der Kontaktzunge verringert.The
Der den Klammerelementen 20 abgewandte Längsrand 38 der Kontaktleiste ist zur Seite der Klammerelemente 20, d.h. also zur Außenseite 18 des Randsteges 14 hin abgekantet, so daß sich die Kontaktleiste beim Montieren des Wandelementes 2 nicht an der Kontaktfläche 26 des benachbarten Wandelementes 6 verhaken kann.The
Die Klammerelemente 20 sind jeweils mit Rastausnehmungen 40 versehen; diese sind dazu bestimmt, sich beim Aufklemmen des Kontaktstreifens auf den Randsteg 14 an diesem ausgebildeten Rastvorsprüngen 42 zu verrasten, wie insbesondere Fig. 3 erkennen läßt.The
Fig. 4 zeigt eine Ansicht einer Kontaktleiste in Richtung des Pfeiles 44 in Fig. 1, d.h. also auf die Vorderseite der Kontaktleiste 16. Es ist zu erkennen, daß eine Vielzahl von in regelmäßigen Abständen zueinander angeordneten Kontaktzungen vorgesehen ist. Der Abstand der Kontaktzungen wird aus den Eigenschaften der abzuschirmenden Störstrahlung bestimmt. Er liegt beispielsweise zwischen 2 und 4 cm.FIG. 4 shows a view of a contact strip in the direction of
Fig. 5 zeigt eine Kontaktleiste gemäß Fig. 4 in einer Ansicht entsprechend dem Pfeil 46 in Fig. 1 und läßt erkennen, daß eine Vielzahl von Klammerelementen 20 in regelmäßigen Abständen zueinander an der Kontaktleiste 16 angeordnet ist. Wie weiter aus einem Vergleich zwischen den Fig. 4 und 5 zu erkennen ist, sind die Klammerelemente 20 jeweils im Bereich von Kontaktzungen 24 und damit in gleichen gegenseitigen Abständen angeordnet, so daß die Kontaktzungen und die Klammerelemente jeweils gleichzeitig durch ein entsprechend ausgebildeten Stanz-Biegewerkzeug hergestellt werden können.FIG. 5 shows a contact strip according to FIG. 4 in a view corresponding to the
Die Kontaktleiste 16 ist aus einem federnden, metallischen Material hergestellt.The
Wie Fig. 2 erkennen läßt, eignen sich die Kontaktleisten gemäß der Erfindung auch zur Herstellung eines abschirmenden Kontaktes der Gerätewand 50 zum an dieser anliegenden Wandelement 2. Die Klammerelemente 54 durchgreifen geeignete Durchbrüche 56 und übergreifen eine Begrenzungskante der Durchbrüche 56, wobei die eigentliche Kontaktleiste auf der dem Wandelement 2 zugewandten Seite der Gerätewand 50 aufliegt und die Kontaktzungen 58 der Kontaktleiste an der Kontaktfläche 26 des Wandelementes 2 anliegen.As can be seen in FIG. 2, the contact strips according to the invention are also suitable for producing a shielding contact of the
Ebenso kann über eine Kontaktleiste gemäß der Erfindung ein abschirmender Kontakt zwischen einem Wandelement, beispielsweise dem Wandelement 6, und einer in Fig. 2 links davon angeordneten Gerätewand hergestellt werden, wie ohne weiteres verständlich und deshalb nicht näher dargestellt ist.Likewise, a shielding contact between a wall element, for example the wall element 6, and a device wall arranged on the left in FIG. 2 can be produced via a contact strip according to the invention, as is readily understandable and therefore not shown in detail.
Claims (8)
- Contact strip (16), composed of metallic material, for plugging onto the edge of a metallic wall element (2) in order to achieve a connection which is proof against interference radiation, a longitudinal edge of the contact strip being constructed like a bracket, and the contract strip having contact regions bent out of the strip plane, characterized in that the contact strip (16) has a row of individual contact tongues (24) which are stamped and bent out of the contact strip plane and are at a distance from one another, and a row of individual bracket elements (20), which are distributed over its length and are at a distance from one another.
- Contact strip according to Claim 1, characterized in that the bracket elements (20) are in each case provided with a latching recess (40) for latching to a latching projection (42) which is constructed on the edge web (14) of the wall element (2).
- Contact strip according to Claim 1 or 2, characterized in that the contact tongues (24) have, in longitudinal section, the shape of an obtuse-angled hook with a first limb (28), which is bent out of the contact strip plane, and a limb (30), which is adjacent thereto and is bent back in the direction of the contact strip plane.
- Contact strip according to one of Claims 1 to 3, characterized in that that longitudinal edge (38) of the contact strip which faces away from the bracket elements (20) is angled towards the side of the bracket elements (20).
- Contact strip according to one of Claims 1 to 4, characterized in that the contact tongues (24) are in each case provided with a cutout (34) which reduces the material cross-section in the region of the bent-out edge (36) of the first limb (28).
- Contact strip according to one of Claims 1 to 5, characterized in that the contact tongues (24) are separated from one another by distance of between 2 cm and 4 cm.
- Contact strip according to one of Claims 1 to 6, characterized in that the bracket elements (20) are separated from one another by a distance of between 2 cm and 4 cm.
- Contact strip according to one of Claims 1 to 7, characterized in that each contact tongue (24) in each case has allocated to it a bracket element (20) which is arranged in the same longitudinal region of the contact strip (16).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9003209U DE9003209U1 (en) | 1990-03-19 | 1990-03-19 | Contact strip for an interference-proof connection of adjacent metallic wall elements |
| DE9003209U | 1990-03-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0447942A1 EP0447942A1 (en) | 1991-09-25 |
| EP0447942B1 true EP0447942B1 (en) | 1994-09-14 |
Family
ID=6852132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91103859A Expired - Lifetime EP0447942B1 (en) | 1990-03-19 | 1991-03-13 | EMI impermeable multiple plug for interconnection of metallic board elements |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US5118307A (en) |
| EP (1) | EP0447942B1 (en) |
| DE (2) | DE9003209U1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1255012B (en) * | 1992-03-27 | 1995-10-13 | Italtel Spa | ELECTROMAGNETIC SHIELDING DEVICE |
| DE4226209C2 (en) * | 1992-05-26 | 1994-08-04 | Siemens Nixdorf Inf Syst | Single contact spring |
| FR2697059B1 (en) * | 1992-10-15 | 1994-11-18 | Rapid Sa | Nut in the form of a clamp mounted on the edge of a panel or any part. |
| SE506319C2 (en) * | 1995-08-21 | 1997-12-01 | Ericsson Telefon Ab L M | Contact spring and device at an electro-optic circuit |
| DE19544835C1 (en) * | 1995-12-01 | 1996-10-31 | Schroff Gmbh | HF-tight electronic appts housing component |
| DE19644418C5 (en) * | 1996-10-25 | 2004-10-28 | Schroff Gmbh | rack |
| US6283770B1 (en) * | 1998-12-11 | 2001-09-04 | Cisco Technology, Incc. | Minimal intrusion EMI shielding clip to maintain electrical contact between two parallel surfaces |
| FI991455A (en) | 1999-06-24 | 2000-12-25 | Nokia Networks Oy | EMI gasket |
| US7619169B1 (en) | 2003-08-08 | 2009-11-17 | Cisco Technologies, Inc. | Method and apparatus for reducing electromagnetic radiated emissions from a chassis |
| US20050121570A1 (en) * | 2003-09-22 | 2005-06-09 | Whorley Thomas A. | Quick set device for mounting electrical devices |
| US7540792B2 (en) * | 2006-08-07 | 2009-06-02 | General Electric Company | Switching apparatus |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB448045A (en) * | 1934-12-03 | 1936-06-02 | Philadelphia Storage Battery | Improved methods and apparatus for suppressing noise in automobile radio receivers |
| US2934590A (en) * | 1958-08-29 | 1960-04-26 | Harry B Thompson | Electric outlet receptacle |
| US3185760A (en) * | 1962-07-06 | 1965-05-25 | Pass & Seymour Inc | Push-in box mounting for wiring devices |
| US3780209A (en) * | 1972-09-27 | 1973-12-18 | Fastway Fasteners | Clip for securing conduit boxes to metal dry wall studs |
| NL172018C (en) * | 1976-11-18 | Tektronix Inc | STRIP SHAPED CONNECTION ELEMENT. | |
| US4322572A (en) * | 1979-10-22 | 1982-03-30 | Tektronix, Inc. | Electromagnetic interference shielding device |
| US4295003A (en) * | 1980-01-07 | 1981-10-13 | Illinois Tool Works Inc. | Threaded screw mounting means |
| DD200252A1 (en) * | 1981-09-11 | 1983-04-06 | Klaus Reeder | CONTACT DEVICE FOR ELECTRICALLY SEALING CLOSURE OF VISOR ELEMENTS |
| DD200352B1 (en) | 1981-10-02 | 1985-12-18 | Eisen Und Huettenwerke Thale I | ELECTROMAGNETIC MULTIFUNCTION GRIPPERS FOR FERROMAGNETIC MATERIALS |
| GB2183920A (en) * | 1985-11-27 | 1987-06-10 | Morgan Marine Limited | Electromagnetic door seal |
| US4699438A (en) * | 1985-11-28 | 1987-10-13 | Hirose Electric Co., Ltd. | Locking mechanism for electrical connector |
| US4780570A (en) * | 1987-03-30 | 1988-10-25 | Unisys Corporation | EMI/RFI shielding for electronic assemblies |
| DE3717009A1 (en) * | 1987-05-21 | 1988-12-15 | Philips Patentverwaltung | Radio unit for a mobile radio system |
| DE8712020U1 (en) * | 1987-09-04 | 1987-12-10 | Siemens AG, 1000 Berlin und 8000 München | Device for contacting a device frame with a housing part |
| DE8803544U1 (en) * | 1988-03-16 | 1988-07-07 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Subrack with shielded plug-in modules |
-
1990
- 1990-03-19 DE DE9003209U patent/DE9003209U1/en not_active Expired - Lifetime
-
1991
- 1991-03-13 DE DE59102888T patent/DE59102888D1/en not_active Expired - Fee Related
- 1991-03-13 EP EP91103859A patent/EP0447942B1/en not_active Expired - Lifetime
- 1991-03-15 US US07/669,919 patent/US5118307A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE9003209U1 (en) | 1991-07-18 |
| DE59102888D1 (en) | 1994-10-20 |
| US5118307A (en) | 1992-06-02 |
| EP0447942A1 (en) | 1991-09-25 |
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